Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2021, Vol. 42 ›› Issue (4): 1080-1085.DOI: 10.3969/j.issn.1000-2561.2021.04.025

• Plant Protection & Bio-safety • Previous Articles     Next Articles

Biological Characteristics of the Pathogen and Fungicides Screening in Laboratory for Anthracnose of Passiflora edulia Sims

RAN Fei1,2, CHEN Jia1,2, MO Feixu1, FAN Rong1,2, YIN Xianhui1,2, LONG Youhua1,2,*(), WU Xiaomao1,2   

  1. 1. Institute of Crop Protection, Guizhou University, Guiyang, Guizhou 550025, China
    2. Engineering and Technology Research Center of Kiwifruit, Guizhou University, Guiyang, Guizhou 550025, China
  • Received:2020-05-19 Revised:2020-08-10 Online:2021-04-25 Published:2021-04-25
  • Contact: LONG Youhua

Abstract:

The experiment was conducted in order to clarify the biological characteristics of Colletotrichum karstii and screen fungicides with better prevention and control. The mycelial growth rate method was applied to explore the biological characteristics of the pathogen and the laboratory toxicity of 9 fungicides to the pathogen. Results indicated that the pathogen was suitable for growth on the SDAY medium with the optimum pH of 6 to 9 and the suitable growth temperature of 20 to 30 ℃, preferably 25 ℃. Besides, it could efficiently utilize sucrose and glycine. Laboratory toxicity test revealed that 9 fungicides had a certain inhibitory effect on the growth of the mycelium of the pathogen. Among them, 75% trifloxystrobin·tebuconazole WG was the most effective with an EC50 of 0.0667 mg/L, followed by procyclidine·azoxystrobin 18.7% SE, fluxapyroxad·pyraclostrobin 42.4% SC, pyraclostrobin 25% SC, prochloraz-manganese chloride complex 50% WP with an EC50 of 0.3335, 0.4567, 0.4630, 0.8187 mg/L, respectively.

Key words: Passiflora edulia Sims, Colletotrichum karstii, biological characteristics, toxicity tests

CLC Number: